NEW YORK — The Federal Trade Commission is suing Qualcomm Inc. for allegedly maintaining a monopoly over a key device used in cellphones and other electronics.

The agency said Tuesday that Qualcomm, the world’s dominant supplier of baseband processors, imposes “onerous” licensing terms on manufacturers and weakens its rivals.

The FTC is seeking a court order to undo and prevent Qualcomm’s methods.

In a statement, San Diego-based Qualcomm said it believes that the FTC complaint is flawed and advances the interests of firms that have earned billions of dollars made possible by “innovators” such as itself.


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